=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for SPTK-3.5.tar.gz
=> Checksum RMD160 OK for SPTK-3.5.tar.gz
=> Checksum SHA1 OK for SPTKexamples-3.5.pdf
=> Checksum RMD160 OK for SPTKexamples-3.5.pdf
=> Checksum SHA1 OK for SPTKref-3.5.pdf
=> Checksum RMD160 OK for SPTKref-3.5.pdf
===> Installing dependencies for sptk-3.5
=> Build dependency x11-links>=0.72: found x11-links-0.74
=> Full dependency tcsh-[0-9]*: found tcsh-6.18.01nb4
===> Overriding tools for sptk-3.5
===> Extracting for sptk-3.5
===> Patching for sptk-3.5
===> Creating toolchain wrappers for sptk-3.5
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/audio/sptk
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/audio/sptk